4 gold plated RCA's (2 RCA input & 2 RCA output). Can adjust the amplifier gain while driving. Two ways of regulation Tone-up regulation. Frequency regulation. Compatible: Car Universal. Just rotate the button gently, and the different frequencies can make the song sounds different.
eBay
High quality 6.5 inch car speaker 400W hifi car audio stereo lossless modification tweeter mid-woofer subwoofer Dynaudio372 OEM
Aliexpress UK
Automotive Fuel Oil Extractor Pump Manual Brake Fluid Extraction Tool for Car Or. DSO152 Digital Handheld Oscilloscope 200KHz Analog Bandwidth 2.5MS/s UK Or. It is manufactured with premium material for durable and long lasting use.
eBay
Car Amplifier Monoblock Class D Subwoofer Car Audio Amplifier Car Speaker 4500W High Power Korean Universal Mono 12db
Aliexpress UK
4 gold plated RCA's (2 RCA input & 2 RCA output). Can adjust the amplifier gain while driving. Two ways of regulation Tone-up regulation. Frequency regulation. Perfect for balancing the system to change music styles.
eBay
7-Band Pre-Parametric with Subwoofer Car Audio EQ Tuning Crossover Car Equalizer
Aliexpress UK
Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
Car Audio 500W Subwoofer Para Coche 12V Car 9 Inch Powerful Subwoofer Bass Dual Speakers Active Spare Tire Subwoofer
Aliexpress UK
It is manufactured with premium material for durable and long lasting use. 20 Small Cones for Sports and Soccer Training. - Strict quality inspectation system insures you premium product and safe usage.
eBay
8 Inch Car Subwoofer DC12v Subwoofer Amplify Car Bass Under The Seat, Audio System Module Car Subwoofer Body Subwoofer 8 Inch
Aliexpress UK
Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
Professional Subwoofer Crossover Stereo Cross Over Limiter Crossover 2/4 Audio Digital Equipment 224XL
Aliexpress UK
The non-fade low-pass output and adjustable low-pass gain allow you to achieve deep bass, and the built-in subwoofer bass boost feature further enhances the low-frequency response, giving your music depth and punch.
eBay
GAX-224XL Professional Subwoofer Crossover Stereo Cross Over Limiter Crossover 2/4 Audio Digital Equipment
Aliexpress UK
Capping power: 200W. Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher.
eBay
Car active subwoofer mounted subwoofer car audio 8-inch 12V high-power
Aliexpress UK